Lamp chimney forming machine



Nov. 14, 1933. E. s. BRUNSON LAMP CHIMNEY FORMING MACHINE Filed May 26, 1952 &

Q UNITED STATES PATENT OFFICE a I "h1 ,'9a5,54'1' a q LAMP cn MNEY FORMING MACHINE Earl Brunson, Elwood, lnd. I Application Ma 26, 1932. serial No. 613,762 -a Claims. (01. 49 -27)" This invention relates to machines for use'in the present invention is mounted, 'thisrtable havthe forming or manufacture of lamp chimneys ing suitable supporting legs 2. and pertains particularly to a machine for form- Mountedupon the table in axial alignment'are ing'a welt or bead around the bottom part or a pairof spaced annular bearings Beach of which 7 :8; heel of the chimney, Y a r is provided with a suitable base 4 to facilitate. its 60 The primary object of the presentinventionis secure attachment to the table and through these to provide a machine to facilitate the forming bearings there extends the cylinder body 5 which of a head or welt around the base or heel portion is provided with peripheral grooves or channel's of the chimney easily and quickly and to supplant 6 in each of whicha ring bearing 3 engages. 7 the old method offorming the tubular base by Mounted upon the cylinder 5, is a gear 5 by hand. 77 I means of which power connection may be made Another object of the invention is to provide a with the cylinder'to effect its rotation. o machine which, after a suitable glassbulb has The ends of the cylinde 5 are Closed by t been blown while the glass is carried upon the plates '7 and 8 and the plate 8 as shown, has a 1, punty, may be causedto operate upon the bulb central opening 9 therein which communicates to open the' same and form the cylindrical base with the circular interior of the tubular exten or heel portion of a lamp chimney and thebead sion 10 which forms an integral part of the plate at the upper part of the base against which the 8 as shown. This exte o 10 't y d ends of, the supporting members .o rjprongs of a, plate is provided with the-longitudinally extendlamp engage when the chimney is in use, ing slots 11 at diametrically opposite points as A still further object of the invention is to pro-- illustrated, and portions of these l cp n vide a machine-for the above described purpose tirely through the W Of the eXtehSiOII, the flin which a novel means is employed for piercing ward ends thereof tapering off in the inner su'r the glass ball or bulb of which the chimney is to face of the extension wall, as illustrated. 25 be formedand fqr spreading'the-bulb about the Secured in any suitable manner to the open pierced area to form the lamp chimney base." 1 forward ,endjofJ-the extension 10 of the cylinder The invention-will be best understood from a, I is a plate 12 which-hasfa vertical slot 13' thereconsideration of the. following detailed descripthrough a a Sh t a e al-Slot 14: which comtion taken in connection with the accompanying municates with" the slot 13 at a point midway drawing forming partof this specification, with between the ends of the latter. This plate 12 the understanding, however, that the invention is fel a ead o the Outer end of the tubular not confined to any strict conformity with the, extension 10 and integral with it there is formed showing.of the drawing butmay be Changedbi' the band 101 fillg 15, the inner surface of which modified so long as such changes or modif cations is flush with the ends of the slot 13; I 5 mark nomaterial departure from the salient fea- Thehslet 1 0f the e p 12 i V rt ca ly tures'of the invention as expressed in the ap va g d-inLl1h Same Vertical p n a th S ots pendedwclaimsh I k v T e '11 in the tubular extension and securedin the In the drawingiv p I openingie are the ends or a pair of elongated Figure 1 is a view" in' longitudinalsection resilient arms 16 which extend forwardly in through ,the mechanism embodying the present nv t la through the extension and invention with parts associated therewith inside through the slot 13 in the head 12, the forwa d 7' elevation; f 3 1 i ends of these arms being tapered and. in con- ..Figure 2 is an enlarged sectional detail taken tacting relaticn to form when together the point longitudinally of the front end of the machine or Sp fwhic is dispersed p the longitudi- 45 in a plane at right angles to theplane of the nal center of the machine. 'As illustrated the section thereof, as shownin Figure 1; rear ends of the forwardly converging arms l6 Figure 3 is a transeversesection taken on the aretlocatd inthe "slots 11 and when the "arms line 3- 3 of Figure 1; 1" v is are sprung apart as will be hereinafter more fully Figure 4 is a transverse section taken on the des r b d y e wa dly into the slots 11.

11 4. 4 f Figure 1, a As lslalso shown, .the'point l'lextends a sub- Referringnow niorezparticularly to the drawstarit ial distance beyond the head 12 and the ing wherein like numerals of reference indicate ring 15 which it carries;

7 corresponding parts throughout the several.views, Suitably mounted'upon the head 12 as by'the the numeral 1 indicates a table or' other suitable supporting earsl8, is an oscillating former or I support upon which the mechanism embodying presserbody 19.? This body is relatively long and llfl arcuately shaped as shown and has one end pivotally attached to the ears l8 and extends through the slot 14 of the head and forwardly beyond the free edge of the band 15 as illustrated in Figure 3.

Within the cylinder 5 there is mounted a relatively long piston body through which extends a rod 21, the forward end of which passes through the opening 9 of the plate 8 and carries the head 22 which is located iii the tubular extension 10 and between the resilient arms 16. The other end of this rod 21 passes through the opposite end plate 7 and is secured in the upturned angu lar extension 23 of an actuating rod 24 which is reciprocably mounted in the supports 25 at the under side of the table 1.

Surrounding the rod 21 between the upturned foot ever 28 which is connected by a link 29 with one arm of ,a'jb'ell crank lever 30 mounted in a suitable position for oscillation in a vertical plane, as for example, upon the bracket 31 mounted upon the forward leg 2 of the table; The

other ai ni'of the bell crank lever 30 has pivotal connection with the forward end of the pull rod 24. v i

Upon the top of the table there are mounted two supporting members each of which isindi- J cated by the numeral 32, the tops of which are 7 suitably formed to support thetube 33 employed by'glass blowers and known as a punty. This tube is employed for picking up a ball of glass and for blowing air into the ball to form the same into "a. bulb. 7 p e In the operation of the present machine a suitable bulb is formed upon the end of the punty 33 in the usual manner and the punty is then disposed across the upper ends of the supports 32 in "the manner illustrated. Thesupports 32 are at the proper height to locate thelongitudinal center of the punty upon the longitudinal center of the tubular extension 10 and the cylinder-5 so that when the punty is shifted longitudinally a toward the point 11 this point willenter the center of the bulb. The movement of the bulb is continued until it is brought into position against the head 12. The forward end of the former member 19 will also enter the bulb.

After locating the glass bulb in the manner described the foot lever 28 is depressed so as to cause the rod 21 and head 22 to move forwardly and. expand the arms 16 and consequently separate the tapered forward ends thereof and the cylinder 5 and parts carried thereby is also re- 'tated so that as the pointed ends of the arms are separated they will smooth out the interior of the bulb against the inner face of the ring 15 and thus form the cylindrical base portion 35 of the, lamp chimney. Continued forward movement of the head 22 will bring the same into contact with the rear end of the oscillatably mounted former 1'9 and cause the free forward end to be swung outwardly to extend beyond the for- .ward edge of the sleeve 15 and consequently press a portion of the glass bulb outwardly. After the former 19 has been moved'to this position it will be readily apparent that upon continued rotation of the cylinder and the'parts carried thereby which includes the former and the arms 16,

the end of the former will move about the interior of the bulb and cause an outwardly pressed bead to be formed thereabout at the upper end of the straight cylindrical heel portion formed by the arms 16.

The lower part of a chimney is shown in position upon'the forward end of the tubular part 10 of the machine and is indicated by the numeral 34, the cylindrical base part being indi-' catedby the numeral 35 and the bead by the numeral 36.

From the foregoing it will be seen that in a machine of the character herein described the base and bead portion of a lamp chimney may be easily and quickly formed and the base will be a perfecteircle and of even thickness throughout.

By mountingthe rod 21 upon the reciprocable, piston body 20 the rod is caused to move forwardly without deviation from the longitudinal center of the tubular extension in which the head at the forward endthereof moves and as will also be readily apparentupon the release of the foot lever the spring-26 will operate to retract the rod 21 so as'to permit the tapered ends of the resilient arms 16 to resume their former positions.

Having thus described the invention, what is claimed is:'' I

l. A base forming device for a lamp chimney, comprising an annular body into which a glass bulb is inserted to be shaped into the chimney base, means coacting with the annular body forshaping the inner surface of the lamp base, said annular body and said means being rotatable, means pivotally carried by and normally projecting from the annular body for engaging the interior of the glass bulb to shape an outwardly pressed bead therein upon the rotation of the body, and means operating to first actuate said first means and then swing said pivotally carried means into operative engagement with the bulb.

2. A machine for forming a cylindrical end upon a plastic bulb of glass from which a lam-p chimney is formed, com-prisinga cylindenmeans for rotatably supporting the same, a tubular extension at one end of the cylinder, a 'rod extend-- ing axially through-the cylinder and having a head at one end located in said tubular'exte'ns ion, an annular former member secured ;to"and coaxial with the tubular extension, a plate closing an end of the former member and constituting a head for the end of the tubular extension, said plate having a slot therein, a pair of arms disposed within the tubular member and arranged in outwardly convergent relation-and having the convergent 'ends 'extending through the slot in said plate, the head of saidro'd' whe'n shifted toward the outer end of the tubular extension separating the convergent ends of said arms, means reciprocablelwithin the cylinder for-carrying said rod, means for'effectingthe reciprocation of the rod and the head carried thereby, and an elongated finger member oscillatably secured to said 'plate'and having one end extending beyond the annular-former member, 'thesaid head of the 'rod being designed to *oscillate said finger to extend the said end thereof outwardly radiallyof the annulus for the formation or an out-pressed bead in the wall of the glass bul-b fromwhichfthe iamp chimney is shaped.

3. A lamp chimney forming machinefcomp'rid having a plate clo'sing the end abutting thefcyli'n dri'cal body, said plate having a slot the're inja foo it's

ion

pair of elongated arms secured to the cylindrical body adjacent the end opposite the cylindrical 'member and having the other ends passing the inner wall of the rotary member and extending through said slot and the cylindrical body to a point outside of the latter and terminating at its free end in a head, said arcuate arm being I swung about its pivot by the arm separating means after the arms have been separated to the limit of their movement to project the head across the outer end of the cylindrical member for the formation of a bead in the lamp chimney base.

EARL s; BRUNSON. 

